35-year-old right-hander Roy Oswalt signed with the Rockies on May 2 and made his first start in extended spring training today, throwing 43 pitches over three innings of work. He allowed four runs, but only one was earned due to three first-inning errors.

Oswalt will receive $15,000 per month in the Minors and will earn a pro-rated portion of a $2.3 million Major League salary. If he is not on the Rockies’ roster on June 18 or June 28, he can request his release if not added to the roster within 72 hours.

Oswalt will make one or more starts in extended spring training before being assigned to the Minors. Troy Renck of the Denver Post suggests Oswalt will join the Tulsa Drillers, the Rockies’ Double-A affiliate.